Portion of a portable cleaning machine



FIG. 1 is a left perspective view of a portion of a portable cleaning machine showing our new design;

FIG. 2 is a right perspective view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a front view thereof; and,

FIG. 6 is a top view thereof.

The portion shown in dashed lines is for illustrative purposes only and forms no part of the claimed design. 

We claim the ornamental design for a portion of a portable cleaning machine, as shown and described. 